[src/trunk]: src/sys/arch/usermode/usermode Add skeleton for possible system ...

[reinoud <reinoud%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9db1e4319343
branches:  trunk
changeset: 769373:9db1e4319343
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Wed Sep 07 14:03:49 2011 +0000

description:
Add skeleton for possible system call implementation

diffstat:

 sys/arch/usermode/usermode/trap.c |  26 +++++++++++++++++++++-----
 1 files changed, 21 insertions(+), 5 deletions(-)

diffs (54 lines):

diff -r 262e6552a129 -r 9db1e4319343 sys/arch/usermode/usermode/trap.c
--- a/sys/arch/usermode/usermode/trap.c Wed Sep 07 13:37:49 2011 +0000
+++ b/sys/arch/usermode/usermode/trap.c Wed Sep 07 14:03:49 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: trap.c,v 1.32 2011/09/07 10:19:40 reinoud Exp $ */
+/* $NetBSD: trap.c,v 1.33 2011/09/07 14:03:49 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2011 Reinoud Zandijk <reinoud%netbsd.org@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.32 2011/09/07 10:19:40 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.33 2011/09/07 14:03:49 reinoud Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -43,6 +43,9 @@
 #include <machine/pmap.h>
 #include <machine/thunk.h>
 
+#include <sys/syscallvar.h>
+#include <sys/syscallargs.h>
+
 //#include <machine/ctlreg.h>
 //#include <machine/trap.h>
 //#include <machine/instr.h>
@@ -281,9 +284,22 @@
                printf("\n");
 #endif
 
-               /* TODO MD syscall pre-fixup  */
-               /* TODO system call issueing  */
-               /* TODO MD syscall post-fixup */
+#if 0
+               /* MD syscall pre-fixup: extract `trapframe' from the MD ctx */
+               syscall_pre_fixup(info->si_addr, ctx, &pcb->pcb_tf);
+
+printf("retrieved opcode %"PRIiPTR"\n", opcode);
+
+               /* system call issueing  */
+               curcpu()->ci_data.cpu_nsyscall++;
+
+               /* XXX do we want do do emulation? */
+               LWP_CACHE_CREDS(l, l->l_proc);
+               syscall(l, &pcb->pcb_tf);
+
+               /* MD syscall post-fixup : convert `trapframe' back to MD ctx */
+               syscall_post_fixup(info->si_addr, ctx, &pcb->pcb_tf);
+#endif
 
                panic("illegal instruction encountered\n");
        }